General anesthesia Flashcards Preview

ABA ITE > General anesthesia > Flashcards

Flashcards in General anesthesia Deck (9)
Loading flashcards...

What are some normal physiological responses to being pregnant?

Decreased serum albumin, increased alpha and beta globulins, increased fibrinogen and factor VII, transferrin and TIBC increases, Fe decreases


Which of the following is NOT affected by volatile anesthetics? SSEPs, MEPs, AEPs, VEPs

Auditory evoked potentials


Describe the mechanism of action of PTH

PTH is activated when calcium is low. It stimulates osteoclast activity to cause bone reabsorption, it activates calcitriol to create vitamin D which stimulates Ca reabsorption in the gut, it increases ca reabsorption in the DISTAL tubule of the kidney


What electrolyte abnormality is seen in respiratory alkalosis?

Hypocalcemia: negatively charged ions are bound to H+. When the body becomes alkalotic, the H+ ions leave the negatively charged proteins and Ca2+ binds instead. This then leads to hypocalcemia


What types of gases will increased MV have the largest effect on?

More soluble gases (in order of most soluble to least: Halothane, isoflurane, sevoflurane, N20, desflurane)


What artery are you at risk for inecting local anesthetic when you are doing an inter scalene block?

The vertebral artery


Define an acid and base in chemistry terms

Acids donate protons and bases receive protons


What is CBF directly related to?

PaCO2, not H+, therefore respiratory acidosis increases CBF more than metabolic acidosis


What metabolic change is seen with TPN?

Hypophosphatemia, this is caused by increased insulin 2/2 increased glucose. This leads to an intracellular shift of phosphate into the cell. This is the principle of re-feeding syndrome and why you cannot give TPN to malnourished people who already have low P